Please do the all 4 Questions with without the show work I added the answers too and all the answers were wrong except Q1

A firm can lease space for the next 3 years by paying a period of time. What is the equivelant interost rate by paying yearty O Between 896&9% one Between 9 & 10% O Between 10 & 11% Between 11 & 12% QUESTION 2 2.5 poi A person invests 3,000 per year- after investing for ten years the employee has 39,000-Using the interpolation method what has been the average rate of return, Between 496 & 5% 0 Between 5%& 6% Between 6%27% Between 7%&8%